<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8" />
    <title>Document</title>
</head>

<body>
    <div id="app">
        <h1>简单计算器</h1>
        <div>
            <span>数值A:</span>
            <span>
          <input type="text" v-model="a" />
        </span>
        </div>
        <div>
            <span>数值B:</span>
            <span>
          <input type="text" v-model="b" />
        </span>
        </div>
        <div>
            <button v-on:click="handle">计算</button>
        </div>
        <div>
            <span>计算结果:</span>
            <span v-text="result"></span>
        </div>
    </div>
    <script src="./vue.js"></script>
    <script>
        var vm = new Vue({
            el: '#app',
            data: {
                a: '',
                b: '',
                result: '',
            },
            methods: {
                handle: function() {
                    console.log(this);
                    this.result = parseInt(this.a) + parseInt(this.b);
                },
            },
        });
    </script>
</body>

</html>